#! /bin/bash

if [ ! -f 'build.sh' ]; then
	echo 'ERROR: This script must be run from the directory it is in' >&2

	exit 1
fi
if [ -z "${TCLVERS}" ]; then
	echo 'ERROR: The TCLVERS environment variable is not set' >&2

	exit 1
fi

KITSHVERS="0.0"
BUILDDIR="$(pwd)/build/kitsh-${KITSHVERS}"
OUTDIR="$(pwd)/out"
INSTDIR="$(pwd)/inst"
OTHERPKGSDIR="$(pwd)/../"
export KITSHVERS BUILDDIR OUTDIR INSTDIR OTHERPKGSDIR

rm -rf 'build' 'out' 'inst'
mkdir 'out' 'inst' || exit 1


(
	cp -r 'buildsrc' 'build'
	cd "${BUILDDIR}" || exit 1

	# Compile all objects...
	## XXX
	${CC:-cc} -I${TCLCONFIGDIR} -I${TCLCONFIGDIR}/../generic -o kit *.c $(find "${OTHERPKGSDIR}" -name '*.a' | grep '/inst/') -lz -lm -ldl  -Wl,-Bstatic -lstdc++ -Wl,-Bdynamic

	# Create VFS directory
	mkdir "starpack.vfs"
	mkdir "starpack.vfs/lib"

	## Copy in all built directories
	cp -r "${OTHERPKGSDIR}"/*/out/* 'starpack.vfs/'

	## Rename the "vfs" package directory to what "boot.tcl" expects
	mv 'starpack.vfs/lib'/vfs* 'starpack.vfs/lib/vfs'

	## Install "boot.tcl"
	cp 'boot.tcl' 'starpack.vfs/'

	# Intall VFS onto kit
	## Copy installed data for packages
	mkdir "installed-pkgs"
	cp -r "${OTHERPKGSDIR}"/*/inst/* 'installed-pkgs/'

	## Call installer
	${TCLCONFIGDIR}/tclsh installvfs.tcl kit starpack.vfs

) || exit 1

exit 0

proc tclInit {} {
  rename tclInit {}

  global auto_path tcl_library tcl_libPath
  global tcl_version tcl_rcFileName
  
  set noe [info nameofexecutable]

  # Resolve symlinks
  set noe [file dirname [file normalize [file join $noe __dummy__]]]

  set tcl_library [file join $noe lib tcl$tcl_version]
  set tcl_libPath [list $tcl_library [file join $noe lib]]

  # get rid of a build residue
  unset -nocomplain ::tclDefaultLibrary

  # the following code only gets executed once on startup
  if {[info exists tcl_rcFileName]} {
    load {} vfs

    # lookup and emulate "source" of lib/vfs/{vfs*.tcl,mk4vfs.tcl}
    # must use raw MetaKit calls because VFS is not yet in place
    set d [mk::select exe.dirs parent 0 name lib]
    set d [mk::select exe.dirs parent $d name vfs]
    
    foreach x {vfsUtils vfslib mk4vfs} {
      set n [mk::select exe.dirs!$d.files name $x.tcl]
      set s [mk::get exe.dirs!$d.files!$n contents]
      catch {set s [zlib decompress $s]}
      uplevel #0 $s
    }

    # use on-the-fly decompression, if mk4vfs understands that
    set mk4vfs::zstreamed 1

    # mount the executable, i.e. make all runtime files available
    vfs::filesystem mount $noe [list ::vfs::mk4::handler exe]

    # alter path to find encodings
    if {[info tclversion] eq "8.4"} {
      load {} pwb
      librarypath [info library]
    } else {
      encoding dirs [list [file join [info library] encoding]] ;# TIP 258
    }

    # fix system encoding, if it wasn't properly set up (200207.004 bug)
    if {[encoding system] eq "identity"} {
      switch $::tcl_platform(platform) {
        windows		{ encoding system cp1252 }
        macintosh	{ encoding system macRoman }
        default		{ encoding system iso8859-1 }
      }
    }

    # now remount the executable with the correct encoding
    #vfs::filesystem unmount $noe
    vfs::filesystem unmount [lindex [::vfs::filesystem info] 0]

    set noe [info nameofexecutable]

  	# Resolve symlinks
  	set noe [file dirname [file normalize [file join $noe __dummy__]]]

    set tcl_library [file join $noe lib tcl$tcl_version]
    set tcl_libPath [list $tcl_library [file join $noe lib]]
    vfs::filesystem mount $noe [list ::vfs::mk4::handler exe]
  }
  
  # load config settings file if present
  namespace eval ::vfs { variable tclkit_version 1 }
  catch { uplevel #0 [list source [file join $noe config.tcl]] }

  uplevel #0 [list source [file join $tcl_library init.tcl]]
  
# reset auto_path, so that init.tcl's search outside of tclkit is cancelled
  set auto_path $tcl_libPath
}

#! /usr/bin/env tclsh

lappend auto_path [file join installed-pkgs lib]
package require vfs::mk4

if {[llength $argv] != 2} {
	puts stderr "Usage: installvfs.tcl <kitfile> <vfsdir>"

	exit 1
}

proc copy_file {srcfile destfile} {
	switch -glob -- $srcfile {
		"*.tcl" {
			set ifd [open $srcfile r]
			set ofd [open $destfile w]

			fcopy $ifd $ofd

			close $ofd
			close $ifd
		}
		default {
			file copy -- $srcfile $destfile
		}
	}

	puts "Copied $srcfile to $destfile"
}

proc recursive_copy {srcdir destdir} {
	foreach file [glob -nocomplain -directory $srcdir *] {
		set filetail [file tail $file]
		set destfile [file join $destdir $filetail]

		if {[file isdirectory $file]} {
			file mkdir $destfile

			recursive_copy $file $destfile

			continue
		}

		if {[catch {
			copy_file $file $destfile
		} err]} {
			puts stderr "Failed to copy: $file: $err"
		}
	}
}

set kitfile [lindex $argv 0]
set vfsdir [lindex $argv 1]

set handle [vfs::mk4::Mount $kitfile /kit]

recursive_copy $vfsdir /kit

vfs::mk4::Unmount $handle /kit

/* 
 * tclAppInit.c --
 *
 *  Provides a default version of the main program and Tcl_AppInit
 *  procedure for Tcl applications (without Tk).  Note that this
 *  program must be built in Win32 console mode to work properly.
 *
 * Copyright (c) 1996-1997 by Sun Microsystems, Inc.
 * Copyright (c) 1998-1999 by Scriptics Corporation.
 * Copyright (c) 2000-2002 Jean-Claude Wippler <jcw@equi4.com>
 *
 * See the file "license.terms" for information on usage and redistribution
 * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 *
 * RCS: @(#) $Id$
 */

#ifdef KIT_INCLUDES_TK
#include <tk.h>
#else
#include <tcl.h>
#endif

#ifdef _WIN32
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#undef WIN32_LEAN_AND_MEAN
#endif

#ifndef MB_TASKMODAL
#define MB_TASKMODAL 0
#endif

#include "tclInt.h"

#ifdef KIT_INCLUDES_ITCL
Tcl_AppInitProc	Itcl_Init;
#endif
Tcl_AppInitProc	Mk4tcl_Init, Vfs_Init, Rechan_Init, Zlib_Init;
#if 10 * TCL_MAJOR_VERSION + TCL_MINOR_VERSION < 85
Tcl_AppInitProc	Pwb_Init;
#endif
#ifdef TCL_THREADS
Tcl_AppInitProc	Thread_Init;
#endif
#ifdef _WIN32
Tcl_AppInitProc	Dde_Init, Registry_Init;
#endif

char *tclExecutableName;

    /*
     *  Attempt to load a "boot.tcl" entry from the embedded MetaKit file.
     *  If there isn't one, try to open a regular "setup.tcl" file instead.
     *  If that fails, this code will throw an error, using a message box.
     */

static char *preInitCmd = 
#ifdef _WIN32_WCE
/* silly hack to get wince port to launch, some sort of std{in,out,err} problem */
"open /kitout.txt a; open /kitout.txt a; open /kitout.txt a\n"
/* this too seems to be needed on wince - it appears to be related to the above */
"catch {rename source ::tcl::source}\n"
"proc source file {\n"
    "set old [info script]\n"
    "info script $file\n"
    "set fid [open $file]\n"
    "set data [read $fid]\n"
    "close $fid\n"
    "set code [catch {uplevel 1 $data} res]\n"
    "info script $old\n"
    "if {$code == 2} { set code 0 }\n"
    "return -code $code $res\n"
"}\n"
#endif
"proc tclKitInit {} {\n"
    "rename tclKitInit {}\n"
    "load {} Mk4tcl\n"
    "mk::file open exe [info nameofexecutable] -readonly\n"
    "set n [mk::select exe.dirs!0.files name boot.tcl]\n"
    "if {$n != \"\"} {\n"
        "set s [mk::get exe.dirs!0.files!$n contents]\n"
	"if {![string length $s]} { error \"empty boot.tcl\" }\n"
        "catch {load {} zlib}\n"
        "if {[mk::get exe.dirs!0.files!$n size] != [string length $s]} {\n"
	    "set s [zlib decompress $s]\n"
	"}\n"
    "} else {\n"
        "set f [open setup.tcl]\n"
        "set s [read $f]\n"
        "close $f\n"
    "}\n"
    "uplevel #0 $s\n"
#ifdef _WIN32
    "package ifneeded dde 1.3.1 {load {} dde}\n"
    "package ifneeded registry 1.1.5 {load {} registry}\n"
#endif
"}\n"
"tclKitInit"
;

static const char initScript[] =
"if {[file isfile [file join [info nameofexe] main.tcl]]} {\n"
    "if {[info commands console] != {}} { console hide }\n"
    "set tcl_interactive 0\n"
    "incr argc\n"
    "set argv [linsert $argv 0 $argv0]\n"
    "set argv0 [file join [info nameofexe] main.tcl]\n"
"} else continue\n"
;

/* SetExecName --

   Hack to get around Tcl bug 1224888.
*/

void SetExecName(Tcl_Interp *interp) {
    if (tclExecutableName == NULL) {
	int len = 0;
	Tcl_Obj *execNameObj;
	Tcl_Obj *lobjv[1];

	lobjv[0] = Tcl_GetVar2Ex(interp, "argv0", NULL, TCL_GLOBAL_ONLY);
	execNameObj = Tcl_FSJoinToPath(Tcl_FSGetCwd(interp), 1, lobjv);

	tclExecutableName = strdup(Tcl_GetStringFromObj(execNameObj, &len));
    }
}

int 
TclKit_AppInit(Tcl_Interp *interp)
{
#ifdef KIT_INCLUDES_ITCL
    Tcl_StaticPackage(0, "Itcl", Itcl_Init, NULL);
#endif 
    Tcl_StaticPackage(0, "Mk4tcl", Mk4tcl_Init, NULL);
#if 10 * TCL_MAJOR_VERSION + TCL_MINOR_VERSION < 85
    Tcl_StaticPackage(0, "pwb", Pwb_Init, NULL);
#endif 
    Tcl_StaticPackage(0, "rechan", Rechan_Init, NULL);
    Tcl_StaticPackage(0, "vfs", Vfs_Init, NULL);
    Tcl_StaticPackage(0, "zlib", Zlib_Init, NULL);
#ifdef TCL_THREADS
    Tcl_StaticPackage(0, "Thread", Thread_Init, NULL);
#endif
#ifdef _WIN32
    Tcl_StaticPackage(0, "dde", Dde_Init, NULL);
    Tcl_StaticPackage(0, "registry", Registry_Init, NULL);
#endif
#ifdef KIT_INCLUDES_TK
    Tcl_StaticPackage(0, "Tk", Tk_Init, Tk_SafeInit);
#endif

    /* the tcl_rcFileName variable only exists in the initial interpreter */
#ifdef _WIN32
    Tcl_SetVar(interp, "tcl_rcFileName", "~/tclkitrc.tcl", TCL_GLOBAL_ONLY);
#else
    Tcl_SetVar(interp, "tcl_rcFileName", "~/.tclkitrc", TCL_GLOBAL_ONLY);
#endif

    /* Hack to get around Tcl bug 1224888.  This must be run here and
     * in LibraryPathObjCmd because this information is needed both
     * before and after that command is run. */
    SetExecName(interp);

    TclSetPreInitScript(preInitCmd);
    if (Tcl_Init(interp) == TCL_ERROR)
        goto error;

#ifdef KIT_INCLUDES_TK
#ifdef _WIN32
    if (Tk_Init(interp) == TCL_ERROR)
        goto error;
    if (Tk_CreateConsoleWindow(interp) == TCL_ERROR)
        goto error;
#endif
#endif

      /* messy because TclSetStartupScriptPath is called slightly too late */
    if (Tcl_Eval(interp, initScript) == TCL_OK) {
        Tcl_Obj* path = TclGetStartupScriptPath();
	TclSetStartupScriptPath(Tcl_GetObjResult(interp));
	if (path == NULL)
	  Tcl_Eval(interp, "incr argc -1; set argv [lrange $argv 1 end]");
    }

    Tcl_SetVar(interp, "errorInfo", "", TCL_GLOBAL_ONLY);
    Tcl_ResetResult(interp);
    return TCL_OK;

error:
#ifdef KIT_INCLUDES_TK
#ifdef _WIN32
    MessageBeep(MB_ICONEXCLAMATION);
#ifndef _WIN32_WCE
    MessageBox(NULL, Tcl_GetStringResult(interp), "Error in TclKit",
        MB_ICONSTOP | MB_OK | MB_TASKMODAL | MB_SETFOREGROUND);
    ExitProcess(1);
#endif
    /* we won't reach this, but we need the return */
#endif
#endif
    return TCL_ERROR;
}

#include <tcl.h>

int TclKit_AppInit(Tcl_Interp *interp);

int main(int argc, char **argv) {
	Tcl_Interp *x;

	x = Tcl_CreateInterp();

	Tcl_Main(argc, argv, TclKit_AppInit);

	return(0);
}

/* Written by Matt Newman and Jean-Claude Wippler, as part of Tclkit.
 * March 2003 - placed in the public domain by the authors.
 *
 * Expose TclSetLibraryPath to scripts (in 8.4 only, 8.5 has "encoding dirs").
 */

#if 10 * TCL_MAJOR_VERSION + TCL_MINOR_VERSION < 85

#include <tcl.h>
#include <tclInt.h> /* TclGetLibraryPath */

void SetExecName(Tcl_Interp *);

/* Support for encodings, from Vince Darley <vince.darley@eurobios.com> */
static int
LibraryPathObjCmd(dummy, interp, objc, objv)
     ClientData dummy;
     Tcl_Interp *interp;
     int objc;
     Tcl_Obj *CONST objv[];
{
     if (objc == 1) {
	Tcl_SetObjResult(interp, TclGetLibraryPath());
     } else {
	Tcl_Obj *path=Tcl_DuplicateObj(objv[1]);
	TclSetLibraryPath(Tcl_NewListObj(1,&path));
	TclpSetInitialEncodings();
	Tcl_FindExecutable(Tcl_GetVar(interp, "argv0", TCL_GLOBAL_ONLY));
  	/* Hack to get around Tcl bug 1224888 */
 	SetExecName(interp);
     }
     return TCL_OK;
}

/*
 * Public Entrypoint
 */

DLLEXPORT int Pwb_Init(Tcl_Interp *interp)
{
    Tcl_CreateObjCommand(interp, "librarypath", LibraryPathObjCmd, 0, 0);
    return Tcl_PkgProvide( interp, "pwb", "1.1");
}

#endif

/* Written by Matt Newman and Jean-Claude Wippler, as part of Tclkit.
 * March 2003 - placed in the public domain by the authors.
 *
 * Reflecting channel interface
 */

#include <tcl.h>

#ifndef TCL_DECLARE_MUTEX
#define TCL_DECLARE_MUTEX(v)
#define Tcl_MutexLock(v)
#define Tcl_MutexUnlock(v)
#endif

  static int mkChanSeq = 0;
  TCL_DECLARE_MUTEX(rechanMutex)

/* Uncomment for Linux or other non-Solaris OS's for memcpy declaration */
#include <memory.h>

/* Uncomment for Solaris (and comment above) for memcpy declaration */
/* #include <string.h> */

#ifndef EINVAL
#define EINVAL 9
#endif

typedef struct
{
  Tcl_Channel _chan;
  int _validMask;
  int _watchMask;
  Tcl_Interp* _interp;
  Tcl_Obj* _context;
  Tcl_Obj* _seek;
  Tcl_Obj* _read;
  Tcl_Obj* _write;
  Tcl_Obj* _name;
  Tcl_TimerToken _timer;
} ReflectingChannel;

static ReflectingChannel*
rcCreate (Tcl_Interp* ip_, Tcl_Obj* context_, int mode_, const char* name_)
{
  ReflectingChannel* cp = (ReflectingChannel*) Tcl_Alloc (sizeof *cp);

  cp->_validMask = mode_;
  cp->_watchMask = 0;
  cp->_chan = 0;
  cp->_context = context_;
  cp->_interp = ip_;
  cp->_name = Tcl_NewStringObj(name_, -1);
  cp->_timer = NULL;

    /* support Tcl_GetIndexFromObj by keeping these objectified */
  cp->_seek = Tcl_NewStringObj("seek", -1);
  cp->_read = Tcl_NewStringObj("read", -1);
  cp->_write = Tcl_NewStringObj("write", -1);

  Tcl_IncrRefCount(cp->_context);
  Tcl_IncrRefCount(cp->_seek);
  Tcl_IncrRefCount(cp->_read);
  Tcl_IncrRefCount(cp->_write);
  Tcl_IncrRefCount(cp->_name);

  return cp;
}

static Tcl_Obj*
rcBuildCmdList(ReflectingChannel* chan_, Tcl_Obj* cmd_)
{
  Tcl_Obj* vec = Tcl_DuplicateObj(chan_->_context);
  Tcl_IncrRefCount(vec);

  Tcl_ListObjAppendElement(chan_->_interp, vec, cmd_);
  Tcl_ListObjAppendElement(chan_->_interp, vec, chan_->_name);

  return vec; /* with refcount 1 */
}

static int
rcClose (ClientData cd_, Tcl_Interp* interp)
{
  ReflectingChannel* chan = (ReflectingChannel*) cd_;
  int n = -1;

  Tcl_SavedResult sr;
  Tcl_Obj* cmd = rcBuildCmdList(chan, Tcl_NewStringObj("close", -1));
  Tcl_Interp* ip = chan->_interp;

  Tcl_SaveResult(ip, &sr);

  if (Tcl_EvalObjEx(ip, cmd, TCL_EVAL_GLOBAL | TCL_EVAL_DIRECT) == TCL_OK)
    Tcl_GetIntFromObj(NULL, Tcl_GetObjResult(ip), &n);

  Tcl_RestoreResult(ip, &sr);
  Tcl_DecrRefCount(cmd);

  if (chan->_timer != NULL) {
    Tcl_DeleteTimerHandler(chan->_timer);
    chan->_timer = NULL;
  }

  Tcl_DecrRefCount(chan->_context);
  Tcl_DecrRefCount(chan->_seek);
  Tcl_DecrRefCount(chan->_read);
  Tcl_DecrRefCount(chan->_write);
  Tcl_DecrRefCount(chan->_name);
  Tcl_Free((char*) chan);

  return TCL_OK;
}

static int
rcInput (ClientData cd_, char* buf, int toRead, int* errorCodePtr)
{
  ReflectingChannel* chan = (ReflectingChannel*) cd_;
  int n = -1;

  if (chan->_validMask & TCL_READABLE) {
    Tcl_SavedResult sr;
    Tcl_Obj* cmd = rcBuildCmdList(chan, chan->_read);
    Tcl_Interp* ip = chan->_interp;

    Tcl_ListObjAppendElement(NULL, cmd, Tcl_NewIntObj(toRead));
    Tcl_SaveResult(ip, &sr);

    if (Tcl_EvalObjEx(ip, cmd, TCL_EVAL_GLOBAL | TCL_EVAL_DIRECT) == TCL_OK) {
      void* s = Tcl_GetByteArrayFromObj(Tcl_GetObjResult(ip), &n);
      if (0 <= n && n <= toRead)
	if (n > 0)
	  memcpy(buf, s, n);
	else
	  chan->_watchMask &= ~TCL_READABLE;
      else
	n = -1;
    }

    Tcl_RestoreResult(ip, &sr);
    Tcl_DecrRefCount(cmd);
  }

  if (n < 0)
    *errorCodePtr = EINVAL;
  return n;
}

static int
rcOutput (ClientData cd_, const char* buf, int toWrite, int* errorCodePtr)
{
  ReflectingChannel* chan = (ReflectingChannel*) cd_;
  int n = -1;

  if (chan->_validMask & TCL_WRITABLE) {
    Tcl_SavedResult sr;
    Tcl_Obj* cmd = rcBuildCmdList(chan, chan->_write);
    Tcl_Interp* ip = chan->_interp;

    Tcl_ListObjAppendElement(NULL, cmd,
	      		Tcl_NewByteArrayObj((unsigned char*) buf, toWrite));
    Tcl_SaveResult(ip, &sr);

    if (Tcl_EvalObjEx(ip, cmd, TCL_EVAL_GLOBAL | TCL_EVAL_DIRECT) == TCL_OK &&
	Tcl_GetIntFromObj(NULL, Tcl_GetObjResult(ip), &n) == TCL_OK)
      if (0 <= n && n <= toWrite)
	chan->_watchMask = chan->_validMask;
      else
	n = -1;

    Tcl_RestoreResult(ip, &sr);
    Tcl_DecrRefCount(cmd);
  }

  if (n < 0)
    *errorCodePtr = EINVAL;
  return n;
}

static int
rcSeek (ClientData cd_, long offset, int seekMode, int* errorCodePtr)
{
  ReflectingChannel* chan = (ReflectingChannel*) cd_;
  int n = -1;

  Tcl_SavedResult sr;
  Tcl_Obj* cmd = rcBuildCmdList(chan, chan->_seek);
  Tcl_Interp* ip = chan->_interp;

  Tcl_ListObjAppendElement(NULL, cmd, Tcl_NewLongObj(offset));
  Tcl_ListObjAppendElement(NULL, cmd, Tcl_NewIntObj(seekMode));
  Tcl_SaveResult(ip, &sr);

  if (Tcl_EvalObjEx(ip, cmd, TCL_EVAL_GLOBAL | TCL_EVAL_DIRECT) == TCL_OK &&
      Tcl_GetIntFromObj(NULL, Tcl_GetObjResult(ip), &n) == TCL_OK)
    chan->_watchMask = chan->_validMask;

  Tcl_RestoreResult(ip, &sr);
  Tcl_DecrRefCount(cmd);

  if (n < 0)
    *errorCodePtr = EINVAL;
  return n;
}

static void
rcTimerProc (ClientData cd_)
{
  ReflectingChannel* chan = (ReflectingChannel*) cd_;

  if (chan->_timer != NULL)
    Tcl_DeleteTimerHandler(chan->_timer);
  chan->_timer = NULL;
  Tcl_NotifyChannel(chan->_chan, chan->_watchMask);
}

static void
rcWatchChannel (ClientData cd_, int mask)
{
  ReflectingChannel* chan = (ReflectingChannel*) cd_;

  /* Dec 2001: adopting logic used in Andreas Kupries' memchan, i.e. timers */

  if (mask) {
    chan->_watchMask = mask & chan->_validMask;
    if (chan->_watchMask && chan->_timer == NULL)
      chan->_timer = Tcl_CreateTimerHandler(5, rcTimerProc, cd_);
  } else if (chan->_timer != NULL) {
    Tcl_DeleteTimerHandler(chan->_timer);
    chan->_timer = NULL;
  }
}

static int
rcGetFile (ClientData cd_, int direction, ClientData* handlePtr)
{
  return TCL_ERROR;
}

static int
rcBlock (ClientData cd_, int mode)
{
  return 0;
}

static Tcl_ChannelType reChannelType = {
  "rechan",       /* Type name.                                    */
  (Tcl_ChannelTypeVersion) rcBlock, /* Set blocking/nonblocking behaviour */
  rcClose,        /* Close channel, clean instance data            */
  rcInput,        /* Handle read request                           */
  rcOutput,       /* Handle write request                          */
  rcSeek,         /* Move location of access point.    NULL'able   */
  0,              /* Set options.                      NULL'able   */
  0,              /* Get options.                      NULL'able   */
  rcWatchChannel, /* Initialize notifier                           */
  rcGetFile       /* Get OS handle from the channel.               */
};

static int
cmd_rechan(ClientData cd_, Tcl_Interp* ip_, int objc_, Tcl_Obj*const* objv_)
{
  ReflectingChannel *rc;
  int mode;
  char buffer [20];

  if (objc_ != 3) {
    Tcl_WrongNumArgs(ip_, 1, objv_, "command mode");
    return TCL_ERROR;
  }

  if (Tcl_ListObjLength(ip_, objv_[1], &mode) == TCL_ERROR ||
      Tcl_GetIntFromObj(ip_, objv_[2], &mode) == TCL_ERROR)
    return TCL_ERROR;

  Tcl_MutexLock(&rechanMutex);
  sprintf(buffer, "rechan%d", ++mkChanSeq);
  Tcl_MutexUnlock(&rechanMutex);

  rc = rcCreate (ip_, objv_[1], mode, buffer);
  rc->_chan = Tcl_CreateChannel(&reChannelType, buffer, (ClientData) rc, mode);

  Tcl_RegisterChannel(ip_, rc->_chan);
  Tcl_SetChannelOption(ip_, rc->_chan, "-buffering", "none");
  Tcl_SetChannelOption(ip_, rc->_chan, "-blocking", "0");

  Tcl_SetResult(ip_, buffer, TCL_VOLATILE);
  return TCL_OK;
}

DLLEXPORT int Rechan_Init(Tcl_Interp* interp)
{
    if (!Tcl_InitStubs(interp, "8.4", 0))
        return TCL_ERROR;
    Tcl_CreateObjCommand(interp, "rechan", cmd_rechan, 0, 0);
    return Tcl_PkgProvide(interp, "rechan", "1.0");
}

/* Written by Jean-Claude Wippler, as part of Tclkit.
 * March 2003 - placed in the public domain by the author.
 *
 * Interface to the "zlib" compression library
 */

#include "zlib.h"
#include <tcl.h>

typedef struct {
  z_stream stream;
  Tcl_Obj *indata;
} zlibstream;

static int
zstreamincmd(ClientData cd, Tcl_Interp *ip, int objc, Tcl_Obj *CONST objv[])
{
  zlibstream *zp = (zlibstream*) cd;
  int count = 0;
  int e, index;
  Tcl_Obj *obj;

  static CONST84 char* cmds[] = { "fill", "drain", NULL, };

  if (Tcl_GetIndexFromObj(ip, objv[1], cmds, "option", 0, &index) != TCL_OK)
    return TCL_ERROR;

  switch (index) {

    case 0: /* fill ?data? */
      if (objc >= 3) {
	Tcl_IncrRefCount(objv[2]);
	Tcl_DecrRefCount(zp->indata);
	zp->indata = objv[2];
	zp->stream.next_in = Tcl_GetByteArrayFromObj(zp->indata,
						  (int*) &zp->stream.avail_in);
      }
      Tcl_SetObjResult(ip, Tcl_NewIntObj(zp->stream.avail_in));
      break;

    case 1: /* drain count */
      if (objc != 3) {
	Tcl_WrongNumArgs(ip, 2, objv, "count");
	return TCL_ERROR;
      }
      if (Tcl_GetIntFromObj(ip, objv[2], &count) != TCL_OK)
	return TCL_ERROR;
      obj = Tcl_GetObjResult(ip);
      Tcl_SetByteArrayLength(obj, count);
      zp->stream.next_out = Tcl_GetByteArrayFromObj(obj,
						  (int*) &zp->stream.avail_out);
      e = inflate(&zp->stream, Z_NO_FLUSH);
      if (e != 0 && e != Z_STREAM_END) {
	Tcl_SetResult(ip, (char*) zError(e), TCL_STATIC);
	return TCL_ERROR;
      }
      Tcl_SetByteArrayLength(obj, count - zp->stream.avail_out);
      break;
  }
  return TCL_OK;
}

void zstreamdelproc(ClientData cd)
{
  zlibstream *zp = (zlibstream*) cd;
  inflateEnd(&zp->stream);
  Tcl_DecrRefCount(zp->indata);
  Tcl_Free((void*) zp);
}

static int
ZlibCmd(ClientData dummy, Tcl_Interp *ip, int objc, Tcl_Obj *CONST objv[])
{
  int e = TCL_OK, index, dlen, wbits = -MAX_WBITS;
  long flag;
  Byte *data;
  z_stream stream;
  Tcl_Obj *obj = Tcl_GetObjResult(ip);

  static CONST84 char* cmds[] = {
    "adler32", "crc32", "compress", "deflate", "decompress", "inflate", 
    "sdecompress", "sinflate", NULL,
  };

  if (objc < 3 || objc > 4) {
    Tcl_WrongNumArgs(ip, 1, objv, "option data ?...?");
    return TCL_ERROR;
  }

  if (Tcl_GetIndexFromObj(ip, objv[1], cmds, "option", 0, &index) != TCL_OK ||
      objc > 3 && Tcl_GetLongFromObj(ip, objv[3], &flag) != TCL_OK)
    return TCL_ERROR;

  data = Tcl_GetByteArrayFromObj(objv[2], &dlen);

  switch (index) {

    case 0: /* adler32 str ?start? -> checksum */
      if (objc < 4)
	flag = (long) adler32(0, 0, 0);
      Tcl_SetLongObj(obj, (long) adler32((uLong) flag, data, dlen));
      return TCL_OK;

    case 1: /* crc32 str ?start? -> checksum */
      if (objc < 4)
	flag = (long) crc32(0, 0, 0);
      Tcl_SetLongObj(obj, (long) crc32((uLong) flag, data, dlen));
      return TCL_OK;
      
    case 2: /* compress data ?level? -> data */
      wbits = MAX_WBITS;
    case 3: /* deflate data ?level? -> data */
      if (objc < 4)
	flag = Z_DEFAULT_COMPRESSION;

      stream.avail_in = (uInt) dlen;
      stream.next_in = data;

      stream.avail_out = (uInt) dlen + dlen / 1000 + 12;
      Tcl_SetByteArrayLength(obj, stream.avail_out);
      stream.next_out = Tcl_GetByteArrayFromObj(obj, NULL);

      stream.zalloc = 0;
      stream.zfree = 0;
      stream.opaque = 0;

      e = deflateInit2(&stream, (int) flag, Z_DEFLATED, wbits,
			      MAX_MEM_LEVEL, Z_DEFAULT_STRATEGY);
      if (e != Z_OK)
	break;

      e = deflate(&stream, Z_FINISH);
      if (e != Z_STREAM_END) {
	deflateEnd(&stream);
	if (e == Z_OK) e = Z_BUF_ERROR;
      } else
	e = deflateEnd(&stream);
      break;
      
    case 4: /* decompress data ?bufsize? -> data */
      wbits = MAX_WBITS;
    case 5: /* inflate data ?bufsize? -> data */
    {
      if (objc < 4)
	flag = 16 * 1024;

      for (;;) {
	stream.zalloc = 0;
	stream.zfree = 0;

	/* +1 because ZLIB can "over-request" input (but ignore it) */
	stream.avail_in = (uInt) dlen +  1;
	stream.next_in = data;

	stream.avail_out = (uInt) flag;
	Tcl_SetByteArrayLength(obj, stream.avail_out);
	stream.next_out = Tcl_GetByteArrayFromObj(obj, NULL);

	/* Negative value suppresses ZLIB header */
	e = inflateInit2(&stream, wbits);
	if (e == Z_OK) {
	  e = inflate(&stream, Z_FINISH);
	  if (e != Z_STREAM_END) {
	    inflateEnd(&stream);
	    if (e == Z_OK) e = Z_BUF_ERROR;
	  } else
	    e = inflateEnd(&stream);
	}

	if (e == Z_OK || e != Z_BUF_ERROR) break;

	Tcl_SetByteArrayLength(obj, 0);
	flag *= 2;
      }

      break;
    }
      
    case 6: /* sdecompress cmdname -> */
      wbits = MAX_WBITS;
    case 7: /* sinflate cmdname -> */
    {
      zlibstream *zp = (zlibstream*) Tcl_Alloc(sizeof (zlibstream));
      zp->indata = Tcl_NewObj();
      Tcl_IncrRefCount(zp->indata);
      zp->stream.zalloc = 0;
      zp->stream.zfree = 0;
      zp->stream.opaque = 0;
      zp->stream.next_in = 0;
      zp->stream.avail_in = 0;
      inflateInit2(&zp->stream, wbits);
      Tcl_CreateObjCommand(ip, Tcl_GetStringFromObj(objv[2], 0), zstreamincmd,
      				(ClientData) zp, zstreamdelproc);
      return TCL_OK;
    }
  }

  if (e != Z_OK) {
    Tcl_SetResult(ip, (char*) zError(e), TCL_STATIC);
    return TCL_ERROR;
  }

  Tcl_SetByteArrayLength(obj, stream.total_out);
  return TCL_OK;
}

int Zlib_Init(Tcl_Interp *interp)
{
    Tcl_CreateObjCommand(interp, "zlib", ZlibCmd, 0, 0);
    return Tcl_PkgProvide( interp, "zlib", "1.1");
}